20 Cellular Concrete Questions in 20 Minutes
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- Опубліковано 29 сер 2024
- Richway Industries is a leading manufacturer in cellular concrete equipment and foam concentrate. Today Tony and Rich will be going over 20 most commonly asked questions about cellular concrete in 20 minutes. Over the years we have gathered these questions form trade shows, calls, and emails we have received. If you have additional questions you would like us to answer please give us a call (800) 553-2404 or type your question below. Also if you would like more information on cellular concrete visit our website, richway.com/co... to check out all of our resources.
I see this stuff, but nowhere has anyone show a complete build with the product, particularly in areas like Florida.
Hey, good job, Tony and Rich. That was very informative. Thanks.
how high vertically
how much does it weigh per cubic foot.. what is the lightest mix
Density can be adjusted to whatever is needed, often times based on desired strength. Using Type 1 Portland and water for the base slurry, you typically won't find wet cast much below 30 PCF, however it is possible. Going with a 30 PCF wet density will yield a dry density of around 25 PCF and on average 100 psi compressive strength. Lighter will be weaker and can be more challenging to have the bubbles stay in tact long enough for the cementitious mix to get a "set".
Would this material be applicable for CMU production?
How does cellular concrete compare with Autoclaved Aerated Concrete?
According to ASTM C90 CMU blocks need to have a compressive strength of 2000 psi. Achieving that strength with cellular concrete is difficult while still achieving much weight reduction. It may be possible to reduce weight of a 140PCF material by as much as 20%-30%, but to still meet 2000 psi you'd need to start with higher strength material - which will have a higher Portland content relative to any course or fine aggregates in the mix. Other high performance cemtitious materials could be used as well. However either of these scenarios means the cost of the material will be higher and by the time you add in foam (which is relatively cheap ~ $10yd³) you may not realize any cost savings. If there are other benefits to be gained i.e. increased insulation, reduced trucking, reduced labor, etc.. it's possibly still worth it. The details of that answer can be highly dependent on the application.
AAC of course is an all together different process and produces materials that in general have a higher compressive strength for any given density. Referencing the answer to your first question, it's possible to produce "cellular concrete" with higher strength/performance than most of what's produced for geotechnical applications today, but that can be a time intensive process.
Hi
Great work👍👍👍
Which is the best pump? Brand or type of pump please suggest.
Typically rotor stator pumps and peristaltic pumps are used in the production of cellular concrete. The short answer is if you're wanting to use sand, I'd look at using peristaltic pump.
Rotor stator pumps will not handle large aggregate well and can be subject to accelerated wear when using sand.
Peristaltic pumps can be more costly upfront and consume a lot of power. However they'll handle any types of aggregate very well.
Swing tube piston pumps can be used, provided the valve clearances are tight on the S-tube and cutter ring, but if they're not you can expect a lot of density increases because air will get squeezed through the gap back into the hopper.
Ball check piston pumps can be used, but if trying to pump material that's already got foam in it, the ball valves may "float" (due to buoyancy caused by the cellular concrete) and not seat properly, causing little to no pumping to occur.
If you're doing in-line injection of the foam, rather than batching before pumping, you can avoid exposing the foam to the shearing action that some pumps types can have.
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Sir i want to know wheather pumping effects the density of foam concrete or not?
There are many factors to consider; the density of the material being pumped, the mix design of the slurry, using a foam concentrate that is designed for producing cellular concrete, the pump pressures, and of course the type of pump. With all factors understood and controlled, cellular concrete can be pumped long distances with little to no change in density.
What should be the density of foam if we are using 400kg/m3 roof insulation
And what if, if use sand in it. Keeping in view the water absorbstion and rough surface and can be deteriorating surface?
In general, the density of the foam won't have an effect on the material once it's gotten a set. The purpose of the foam is to create an air void matrix in the slurry. After it's gotten a set, the foam no longer exists and has served its purpose. That being said, the foam still needs to "survive" the mixing, pumping/placement, and setting process. With our foam concentrate and equipment we recommend a foam density of 32-48kg/m³ and a water to concentrate ratio of 40:1 - 50:1. We'll be publishing a video describing foam density and water to concentrate ratio in more detail in the next few weeks.
Hey - thanks fir the video. I’d like to make large planter pots using 2 different diameter plastic pots as a mold .. and wanted to make them lighter weight since they are quite large. I’ve attempted to use my drill, fitted with a paddle to mix Suave shampoo and water for foam .. initially, it made a very dense foam but quickly turned into air and obviously not dense enough to mix into cement. Can I mix the CMX in this same way and achieve a good resulting foam? Also .. is pre-mixing the foam with water and then mixing into the pre-mixed cement - the best method of blending the two?
Using a concentrate designed specifically for cellular concrete will improve the results you're getting with your method. Using an "externally generated" foam would be more consistent, but if you're only wanting to do this for one or two pots may not be worth the effort and money to buy and or build. You could consider using styrofoam beads to reduce the weight. Not to up sell a competing product, but for this application (again if it's just one or two pots) it may be a simpler way to achieve what you're wanting to do.
@@RichwayIndustries1 thank you for responding. Just to get clear, are you saying that I would get better results using a liquid designed for making foam to mix with concrete .. and also using it with my drill and paddle (as I had tried to do with the Suave) .. but if I want to ensure a good foam, I’d need a foam generator (which, I agree, I don’t want to invest in) .. but .. my best solution may be styrofoam balls?
So .. I guess you all have tested making the foam with a paddle attached to a drill and it doesn’t get to the same density as the foam generator machine does?
Thanks again.
The best composition with their ratios for 400kg/m3
I'd start with a slurry mix of Portland and water using a water:cement ratio of .50 - .60. Adding sand will create a weaker (in terms of compressive strength) material. To make that up you'd need to make a higher density, which in turn will drive the cost of the material up, offsetting the economics of using sand.
@@RichwayIndustries1 Sir great to see such described answeres.
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Stay blessesd
Feeling honoured for your response.
Great sir
Sir hope you are fine. May i know the contact details of you. Whatsapp
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